Genetic analysis in tetraploid wheat
KrishiKosh
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Title |
Genetic analysis in tetraploid wheat
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Creator |
B.Subhashchandra
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Contributor |
H.C.Lohitaswa
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Subject |
Genetics and Plant Breeding
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Description |
A study was undertaken during 2005-06 rabi season in wheat improvement project field, University of Agricultural Sciences, Dharwad, on eight parents, their F2 progenies (without reciprocals) obtained from selfing of 28F1s generated by crossing the parents in a half diallel mating design, to investigate the nature of combining ability of different parents and gene action. Extent of variability, heritability and the genetic advance, correlation between yield and yield attributing traits were also computed and also ensures to determine the relationship between genetic diversity and transgressive segregants. Analysis of variances for combining ability revealed that both GCA and SCA variances were important for all the characters and the characters like plant height, spike length, sedimentation value, -carotene content and protein content showed the predominance of additive gene action. The variability study indicated moderate to high phenotypic and genotypic coefficient of variation accompanied by high heritability and genetic advance for days to 50% flowering, days to 80% maturity, spike length, productive tillers per plant, protein content and yield per plant and hence these characters are amenable for simple selection of superior segregants. Correlation studies indicated that yield per plant had significantly positive association at phenotypic and genotypic level with spike length and productive tillers per plant. Days to 50 per cent flowering, spike length and productive tillers per plant also showed positive direct effect on yield. It is also evident from the diversity analysis that specific combination of parents HW- 2000 × DWR-1006 having more inter cluster distance have yielded more number of transgressive segregants indicating the relationship between genetic diversity and transgressive segregants. |
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Date |
2016-10-24T16:33:36Z
2016-10-24T16:33:36Z 2007 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/81584
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Format |
application/pdf
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Publisher |
UAS, Dharwad
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